Fuel briquette and process of making the same



Patented a. 13,1925.

uurrw s'mrss 301m" 1'. ODONNELL, or MORRIS RUN, PENNSYLVANIA.

FUEL BRIQ UETTE AND PROCESS OF MAKING THE SAME.

no Drawing.

To allmihom it may concern:

Be it known that I, JonN F. ODoNNnLL, a citizen of the United States,and a resident of Morris Run, in the county of Tioga Y and State ofPennsylvania, have invented a jeet of the invention is to provide abriquette for fuel, made from grades of coal which ordinarily are low involatile content, so that the briquettes form a high-grade fuel,smokeless, non-coking, quick to ignite and clean to handle.

Another object concerns the provision of a simple process whereby suchbriquettes can be quickly and economically manufactured.

lln general'the process includes the inixture of the finer grades ofbituminous or anthracite coal in proper proportions with the dust coalof either or both forms. This mixture is placed in suitable molds andfirmly packed down and then subjected for a short period of time to moreor less definite temperatures, after which it is taken out of the moldsand can be stored away for future use. 7

My inventionconcerns the mixture of semibituminous fine and dust coaland-authracite birdseye, barley and dust coal.

One preferred form of mixture would comprise per cent of a mixture ofanthracite birdseye coal and anthracite dust coal thoroughly mixed with50 per cent of a mixture of semibituminous line and dust coal.Preferably the semibituminous coal should have under 23 per centvolatile matter.

Any one of the mixtures above described, either all semibituminous orhalf anthracite and half semibituminous, preferably after being slightlymoistened, can be placedin a metal container and firmly packed'down,said container being made of thin sheet metal capable of withstanding ashigh a temperature as 1200 F. for a period as long as ten minutes. Thecontainer may be divided, if desired, into pockets, each pocket the sizeand shape of the briquette desired. The container will have a top andbottom which can be assembled and, referably, the top isprovided withsmall holes to allow gas to escape durin the operation. The container isthen p aced in any suitable Application filed April 12,4924. Serial No.708,172.

furnace or chamber and subjected to temperatures which may range from800 to 1200 F., depending upon the character of the mixture used. Thesebriquettes will be thoroughly carbonized in from three to six minutes.After-the operation, the gas escaping through the apertures in the covercan be quickly extinguished by running a roller, preferably covered withsome noncombustible material, over the vents or openings.

It has been found that in taking the raw coal and manufacturing it intocarbonized briquettes the loss in weight will be very small,approximately not more than five per cent. In reference to moisteningthe coal, this is found to be generally preferable, especially in thecase of semibituminous coal.

It will thus be observed that I can take a mixture of anthracitefine-grade coal. and mix it with approximately 50 per cent of anthracitedust coal and semibituminous dust coal and treat it in accordance withthe above-mentioned process and get a highgrade briquette having thecharacteristics mentionedm On the other hand, I can take.

50 per cent seniibituminous line coal and mix it with 50 per centsemibituminous dust coal, slightly 'molstened, and sub ect theapproximately fifty per cent proportions,

placing the mixture in a mold under pres sure, and subjecting thematerial to temperatures in the ncighborhooi'l of 1000 F. for from threeto six minutes.

2. The process of producing a higlrgrade fuel briquette, which comprisesmixing fifty per cent of fine anthracite coal of barley get a high-grade'mixtureto the same process. Still further,

size with fifty per cent of a semibituminous dust coal and subjectingthis mixture in a mold to pressure 1n a temperature of 1000 F. forseveral minutes.

JOHN F. UDONNELL.

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